{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780182138",
    "entityType": "Track",
    "nonce": "0x3a28fc6ef852aedf1e503a373aada4c04f9715c250f828999dd1614f6594a28b",
    "signature": "0xe59165b2ec4ecaec016070c0d68521fcbf1efa88b4f509c2944df1e3091bedbd08c611b7e812d089dffb113028e69da3da6837160f7f5c0ed521a443ccee37bf1c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}